step(umc1,ci,tm(s,[ctxm(alpha_1_2_,umc,ip, (ip,umc1), (ip,umc1)),ctxm(alpha_1_2_,ci,ip, (ip,ci), (ip,ci))],pri(lst,[pri(pc,[ctxm(alpha_1_2_,dot,s,i_s,c_s),ctxm(alpha_1_2_,u,bsn,i_bsn,i_bsn),ctxm(alpha_1_2_,umc,dom, (dom,umc1), (dom,umc1))]),ctxm(alpha_1_2_,umc,dom, (dom,umc1), (dom,umc1)),ctxm(alpha_1_2_,u,d_1, (i,d_1), (c,d_1)),ctxm(alpha_1_2_,u,d_2, (i,d_2), (c,d_2)),ctxm(alpha_1_2_,u,d_3, (i,d_3), (c,d_3))]))).
